Myongji University Industry and Academia Cooperation Foundation

Myongji University Industry and Academia Coopertaion Foundation

Rey Eliseo C Torrejos

Jeong Gil Seo

Wook-Jin Chung

Myoung Jun Park

Seong-Poong Lee

Grace M Nisola

Eleazer L Vivas

Young Deuk Yoo

Lawrence A Limjuco

Hern Kim

Arnel B Beltran

Disclosed herein are a novel crown ether with bulky and rigid groups and a method for preparing the same. Also provided are a lithium adsorbent comprising the novel crown ether immobilized onto a nanofiber, and a method for preparing the same. The lithium-selective crown ether is synthesized through intermolecular cyclization between a bulky epoxide and a rigid aromatic compound such as 1,2-dihydroxybenzene, and can effectively recover lithium ions. For use as a lithium adsorbent, the novel crown ether with both bulky and rigid subunits is immobilized onto a polymer nanofiber. The crown ether-immobilized polymer nanofibers may be formed into a recyclable membrane.

Lithium-selective crown ether, lithium adsorbent using same, and preparation method thereof

Disclosed are a composite nanofiber membrane for the adsorption of lithium, a method for preparing the same, and a lithium recovery apparatus and method using the same. The composite nanofiber membrane for the adsorption of lithium is immobilized with manganese oxide selectively adsorptive of lithium. The composite nanofiber membrane for lithium adsorption exhibits high selectivity for lithium ions and allows for the rapid and easy diffusion of lithium ions through interstitial spaces of the adsorbent. Particularly, the lithium recovery apparatus using the composite nanofiber membrane for lithium adsorption is able to effectively adsorb lithium ions dissolved in seawater in a selective manner within a short period of time, thus reducing the time taken for the adsorption process.

Composite nanofiber membrane for adsorbing lithium, method of manufacturing the same and apparatus and method for recovering lithium using the same

Growing community of inventors

Yongin-si, South Korea

Rey Eliseo C Torrejos